Grinder.



A. J. McC ONE. GRINDER.

APPLICATION FILED MAR. 29. I915.

1,163,246. I Patented Dec. 7, 1915.

3 SHEETSSHEET 1- l/VVE/VTOR 7: Mfhdw a "3w, 3. m BY ky A TTOR/VEV A. J.McCONE.

GRINDER.

APPLICATION FILED MAR. 29. I915.

1,163,246. Patented Dec. 7, 1915.

3 SHEETS-SHEET 2- A TTUR/VEY IIOLUMBIA PLANOGRAPH co" WASHINGTON. D. c

A. J. McCONE.

GRINDER.

APPLICATION HLED MAR. 29, 1915.

1,163,246. I Patented Dec. 7, 1915.

3 SHEETS-SHEET 3.

COLUMBIA PLANOGRAI'H co, 'wAsmxc-ros r4 @FTQFZ.

ALEXANDER J. MCCONE, DE LOS ANGELES, CALIFORNIA.

GRINDER.

To all whom it may concern: I

Be it known that I, ALEXANDER J. Mo- CONE, a citizen of the UnitedStates, residing at Los Angeles, in the county of Los Angeles and Stateof California, have invented certain new and useful Improvements inGrinders, of which the following is a specification. My inventionrelates to that class of grinder in which the shoe or wearing face of arotating grinding member is held against the die or wearing face of anon-rotating grinding member, the material being fed in the axis of oneofsaid members and thence passing outwardly between the wearing rotatingmember.

To this end my invention consists in the novel grinder which I shallhereinafter fully describe, by reference to the accompanying drawings inwhich Figure 1 is an elevation, partly in section, of the grinder. Fig.l is a sectional elevation, enlarged, of theupper end of the piston rod36 showing its fluid-pressure connections. Fig. 2 is a top plan of thegrinder. Fig. 3'is a section'on the line w e of Fig. 1.

Fig. 4 is a section on the line ;z of Fig. 1,

parts being brokenaway. Fig. 5 is a plan view, enlargechshowing thesupport 33 on the column for the push lever 32. Fig. 6 1s a side view ofthe same. F ig. 7 is aview,

enlarged, of the eccentric ball connection to adjust the v non-rotarygrinding member. Fig. 8 is a perspective view of a portion, broken, ofthe wearing shoe 8. I t

1 is a base from which rises a column 2 having a. horizontal arm 3carrying a bearing 4 in which is mounted the'vertical driving shaft 5.The lower portion of the shaft 5 carries a driving pulley 5 and the footof said shaft is carriedin a step 6 on the base 1. To the head of saidshaft is fixed the rotating grinding member 7, which is p e.

Specification of Letters Patent.

[other Patented Dec. 7, 1915.

Application filed March 29, 1915. Serial No. 17,742.

vided with an annular wearing shoe 8, said shoe being here shown asbeing of the deeply serrated form known in this type of mill, andsecuredfirmly by means of a boss 9 of each tongue portion fitting in a socketin the grinding member and bolted therein as shown at 10.

Above the rotating grinding member is the non-rotating grinding member11, the middle of which is formed with a feed hopper 12, having spacedarms 13. The member 11 is provided with a wearing die 14-,

similar to the wearing shoe 8 of the rotating member 7 and similarlysecured.

Carried by a bracket 15 on the column 2 is a launder 16 which encirclesthe periphery of the grinding members and is provided with a drain 1'?to conduct the ground material to the classifier, or copper-platesordestination. The upper grinding member 11 is kept from rotating bysuitable means, here shown as a chain 2 connecting it with the column 2.v

The mill, thus far described, is, in general, a well known typeofgrinder, in which the material is fed through the hopper 12 of 1 theupper or non-rotating member, and, un-

der its hydrostatic head and centrifugal force is compelled to passoutwardly between the shoe and die of the grinding mem- In this type ofbers andinto the launder. grinders, it is essential to provide forvarying or changing the relative position of the grinding members in theplane of their wearing faces, in order to prevent the grooving orscoring of their shoes and dies and to cause these latter to wear and toremain level, fair and ungrooved; and it is also essential to applypressure to drive and hold the wearing faces of the grinding memberstogether, said pressure being usually applied to the upper ornon-rotating member. It is in these essentials that my improvementsconsist, and I carry them out by an automatic adjustment of thenon-rotating member relatively to the rotat ng member in the plane oftheir wearing faces, and by fluidpressure constantly applied to sandnon-r0- tating member, the means by which the two results are effectedbeing sufiiciently intimately associated to enable them to perform theirfunctions simultaneously without interference.

The hopperarms 13 of the upper grinding member carry a central socket18, fitted with a lQ IlQVable section 18 to admit the 3 ball 19, carriedeccentrically upon the lower end of a shaft 20. The upper end of theshaft 20 is secured to a piston 21, which operates within a cylinder 22,said cylinder having a neck 23 which is mounted rotatab-ly in the upperend of the column 2 upon the seats 24. The shaft 20 has lineal movementin the cylinder neck 23 but is keyed therein at 20 against independentaxial movement, so that the movement of the cylinder on its axis carriesthe shaft with it. It will, therefore, be seen that when cylinder 22 ismoved on its axis, the shaft 20 being carried with it, will, through itseccentrical-ly mounted ball 19 shift the upper grinding memberhorizontally relatively to the lowergrinding member, the chainconnection 2 permitting this adjustment. New, to provide for arelatively slow automatic adjustment of this character, I have on thelower portion of the driving shaft 5 a worm- 25 which meshes with a wormgear 26 on a horizontal countershaft 27 carried by the foot of thecolumn 2.

The other end of the countershaft 27 carries a worm 28 which meshes witha worm gear 29 on a vertical shaft 30, carried by the column 2. Theupper end of the vertical shaft 30 carries an eccentric 31, to which isfitted by one end a push lever 32,, guided at 33 on the column 2. Theother end of the lever 32, carries a pawl 3a which engages a ratchet 35on the cylinder 22. Though the time of the adjustment of the uppergrinding member may be varied, I have found in practice that a cycle ofmovement once in four to siX minutes is beneficial, the rotating memberrev-olwi-ng 200 to the minute.

The fluid pressure on the upper grinding member is effected through thepiston 21 to which the upper end of the shaft 20 is secured. This pistoncarries an. upwardly eX- tending rod 36, which passes out through theupper end of the cylinder. The rod 36 is formed or drilled with twolongitudinal ports, one of which, designated by 37, communicates withthe cylinder above the piston, and the other, marked 38, communicateswith the space below the piston. The upper end of the rod 36 is fittedwith a bearing cap 39 having a connection 40 for a flexible pipe 4-1.This connection communicates with the port 37 in the rod 36. The bearingcap 39 has another connection 42 for a flexible pipe 43, said connectioncommunicating with the port 38 in the rod. The twoflexible pipes 41 and43 unite in a common pipe A controlled by a fourway cock. 45. Fluidpressure being admitted to port 37 will drive the piston down, thepressure-under the piston relieving through port- 38. Thus the requiredpressure may be had to drive and hold the grinding members together, andthis may be kept constant without any further attention or adjustment.This same pressure arrangement is made also to serve the purpose ofdirectly lifting the upper grinding member of the mill when necessary.This is efiected by the operation of the four way cook 45 admittingpressure to the port 38' and relieving through the port 37 1. In agrinder, the combination of a rotatable grinding member and drivingshaft therefor; an opposing non-rotatable grinding member, each memberhaving a wearing face; and means for universally adjusting thenon-rotatable member relatively to the rotatable member comprising anaxially turnable and longitudinally slida-bleshaft, a universaleccentric connection between said shaft and the nonrotatable member, andmeans for automatically imparting movement to the turna-ble andsliidableshaft.

2. In a grinder, the combination of a rotatable grinding member anddriving shaft therefor; an opposing non-rotatable grinding member, eachmember having a wearing face, and means for universally adjusting thenon-rotatable member relatively to the rotatable member comprising arotatable and slid-able shaft having a ball eccentrically mounted uponone end, a, socket the axis of the non-rotatable member, in which the Vball is universally mounted, power transmitting connections from thedriving shaft of the rotatable member to rotate the eccentric. shaft,and means. for imparting l-ongitudinal movement to said eccentric shaft.

3 grinder, thev combination; ofa rotatable grinding member anddrivingshaft therefor; an opposing IlOllrlOliBitElblG grinding member,each member having a wearing face, and? means for universally adjustingthe non rotatable member relatively to the rotatable member comprising arotatable and slidable shaft having a ball eccentrically mounted uponone end, a socket in the axis of the non-rotatable member, for universalengagement with said ball, and power transmittin-g connections from, thedriving;- shaft of the. rotatable member to rotate the eccentric shaft,said, power transmitting connections including gears and shafts, a push;lever, eccentric appliedto one end of the e e and a paw and r tchetdevice between the other end; of the leverand said turnable shaft, andvmeans for imparting longitudinal movement to said eccentric; shaft.

4. In, a grinder, the combinationof a rotatable; grinding member and;driving shaft therefor; an opposing HQHf-I'Oil'lliib'blQ grinding;member, each member having a wearing surface means for universallyadijusting; the; non-rotatable member relatively to tharota-tablflmember comprising an axially turua eand longitud nally sliidable shaft,a universal eccentric connection between said shatt the nona ablemember,power transmitting connections from. the driving shaft of the rotatablemember to rotate the eccentric shaft, and fluid-pressure means forimparting longitudinal movement to said eccentric shaft.

5. In a grinder, the combination of a rotatable grinding member anddriving shaft therefor; an opposing non-rotatable grinding member, eachmember having a wearing surface; and means for universally adjusting thenon-rotatable member relatively to the rotatable member comprising anaxially turnable and longitudinally slidable shaft, having a balleccentrically mounted upon one end, a socketin the axis of thenon-rotatable member adapted to universally engage said ball, powertransmitting connections from the driving shaft of the rotatable memberto rotate the eccentric shaft, and fluidpressure means for impartinglongitudinal movement to said eccentric shaft.

6. In a grinder, the combination of a rotatable grinding member; anopposing nonrotatable grinding member movable to and from the rotatablemember and also movable with relation to the rotatable member in theplane of the grinding faces of said members; an axially turnable andlineally movable shaft having an eccentric connection with thenon-rotatable member; a piston on said shaft; an axially turnablecylinder in which said piston operates, said cylinder and shaft beinglocked together for simultaneous axial movement; means for turning thecylinder on its axis; and controllable fluid connections to move thepiston in either direction.

7 In a grinder, the combination of arota-table grinding member, anddriving shaft therefor; an opposing non-rotatable grinding membermovable to and from the rotatable member and also movable with relationto the rotatable member in the plane of the grinding faces of saidmembers; an axially turnable and lineally movable shaft having aneccentric connection with the nonrotatable member; a piston on saidshaft; an axially turnable cylinder in which said piston operates, saidcylinder and shaft being locked together for simultaneous axialmovement; power transmitting connections from the driving shaft of therotatable member to rotate the cylinder; and controllablefluid-connections to move the piston in either direction.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALEXANDER J MGCONE.

Witnesses WM. F. BOOTH, D. B. RICHARDS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

